Swimming Pool Boilers

Swimming Pool Boilers

What are the best ways to heat a swimming pool?

A wonderfully and refreshing dip in your swimming pool is hard to beat, but managing the temperature of thousands of litres of water can be challenging and expensive. There are several ways of heating swimming pools – whether domestic or commercial, indoor or outdoor. Solar panels are growing in popularity globally, but they’re likely to remain an option for warmer climates only, as they would struggle to create enough heat in the cooler temperatures we have here in the UK. Heat pumps are a popular option. Although initially expensive to buy, they are cheap to operate because they only use a small amount of electricity to capture heat from the air before moving it efficiently into the water. However, they do take a long time to heat a pool and are limited to summer use only as they rely on higher air temperatures.

How a heat pump works:

  • A fan draws in outside air and directs it over the evaporator coil radiator
  • Liquid refrigerant in the coil absorbs the heat from the air and turns it into gas
  • The warm gas passes through a compressor that increases the heat
  • The resulting hot gas then passes through the condenser
  • The condenser transfers heat from the gas to the cooler pool water circulating through the heat pump
  • The heated water is returned to the pool
  • The hot gas returns to liquid form as it rapidly cools in the condenser coil and to the evaporator
  • The process is repeated continuously to maintain a flow of warm water

Boiler systems are the number one swimming pool heating source in the UK. They consistently outsell heat pumps because of the speed at which they can warm a pool and the fact there’s no reliance on air temperature, so they can be used all year round. They are also less expensive to buy than a heat pump, but running costs are higher as they need fuel to function. Boilers create heat by burning gas or oil inside a combustion chamber; this heat is then transferred to the water that’s been pulled from the pool before pumping it back into the swimming pool. 

How a gas or oil swimming pool boiler works:

  • Cold water is pumped out of the pool and passes through a filter
  • Gas or oil is burned in a combustion chamber
  • The resulting heat is passed to the water
  • Warm water is returned to the pool

The process is repeated continuously to maintain a flow of warm water. The amount of time it takes for a gas boiler to heat up a swimming pool will vary depending on the size of the pool and the amount of water being heated. But for an average-sized domestic pool, it usually takes between one and two days to get the water to a comfortable temperature for swimming.

Domestic boiler with a heat exchanger:

You can also use a standard domestic boiler to heat your pool. The boiler transfers its heat to the pool water via a specially designed heat exchange unit. Although not considered a proper way to heat your pool this option can bring many advantages. This includes the benefit of an extended domestic boiler warranty and the extra versatility of using the boiler for hot water.

How much does a replacement swimming pool boiler cost?

Depending on the size of your pool, a new gas or oil swimming pool boiler will cost £4-5000 (inc VAT) supplied and installed. To get a quote, click HERE

As with most appliances, ensuring your pool boiler is serviced regularly is critical to ensure safety, efficiency and longevity. Annual servicing is strongly recommended and is a condition of the guarantee for some manufacturers. All maintenance and repairs should be carried out by a qualified pool boiler engineer, of course, but to prevent issues, it’s also a good idea for any pool owner to routinely do the following:

  • Clean the filter as the boiler requires a steady flow of water to run properly
  • Ensure the pool skimmer is clean and unobstructed
  • Wash the tanks down to get rid of debris and prevent the burner openings from getting clogged
  • Check the gas or oil pipework isn’t corroded 

When your pool boiler is coming towards the end of its life, usually after around ten years, something else worth considering is to install a new system alongside and switch to that as the primary heat provider, but keep the old system in place. This way, you can rest assured that you have a backup solution to allow for continuous heat function during any repair window.

At MHL, we install, service and repair gas and oil swimming pool boilers nationwide. We can advise on any questions you may have about heating pools. We can also provide advice on the most efficient options available to you.

Get in touch today 0800 061 4567  info@moorhouseheating.com

Click here to get a quote for a new swimming pool boiler

 More information on our swimming pool boiler services

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